Admidio: Cross-Organization Member Data Exposure via Permission Check Mismatch in contacts_data.php_CVE-2026-41657

{
    "lastseen": "",
    "description": "Admidio is an open-source user management solution. Prior to version 5.0.9, the contacts_data.php endpoint uses a weaker permission check (isAdministratorUsers(), requiring only rol_edit_user=true) than the frontend UI (contacts.php) which correctly requires the stronger isAdministrator() (requiring rol_administrator=true) and the contacts_show_all system setting. A user manager who is not a full administrator can directly request contacts_data.php?mem_show_filter=3 to retrieve all user records across all organizations in the Admidio instance, bypassing multi-tenant organization isolation. This issue has been patched in version 5.0.9.",
    "published": "2026-05-07T02:58:09.340Z",
    "modified": "2026-05-07T02:58:09.340Z",
    "type": "cve",
    "title": "Admidio: Cross-Organization Member Data Exposure via Permission Check Mismatch in contacts_data.php",
    "source": "GitHub_M",
    "references": "https://github.com/Admidio/admidio/security/advisories/GHSA-g8p8-94f2-28gr\nhttps://github.com/Admidio/admidio/releases/tag/v5.0.9",
    "id": "CVE-2026-41657",
    "bulletinFamily": "",
    "cwe": [
        "CWE-863"
    ],
    "cvelist": null,
    "sourceData": "Admidio admidio < 5.0.9",
    "sourceHref": "",
    "cvss": {
        "score": 4.9,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "admidio",
    "version": "< 5.0.9",
    "vendor": "Admidio",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}